EP0417836A1 - Punching machine - Google Patents
Punching machine Download PDFInfo
- Publication number
- EP0417836A1 EP0417836A1 EP90202364A EP90202364A EP0417836A1 EP 0417836 A1 EP0417836 A1 EP 0417836A1 EP 90202364 A EP90202364 A EP 90202364A EP 90202364 A EP90202364 A EP 90202364A EP 0417836 A1 EP0417836 A1 EP 0417836A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- die
- height
- holder
- punch holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/002—Drive of the tools
- B21D28/005—Adjustment of the punch stroke for compensating wear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/12—Punching using rotatable carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
- B21D28/346—Perforating tools; Die holders length adjustable perforating tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
- B21D45/006—Stripping-off devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
- The invention relates to a punching machine according to the preamble of claim 1.
- Such punching machines are generally known and are used for making shaped holes, slits and the like in sheet-type material. In addition, it is possible with these machines, depending on the shape of a punch and a die, to provide the material to be worked with protuberances, possibly combined with holes.
- The punching of various holes and/or protuberances requires different punches with matching dies and strippers. In practice, these elements will thus have to be changed many times. When this changing has to take place quickly (something which is necessary to reach high production) these three different elements are accommodated together in a standard tool holder. Such a tool holder, containing a punch, a die and a stripper, is simple to fit in and remove from the punching machine. This solution does, however, require the use of several expensive tool holders, which tends to increase costs and is thus unattractive, in particular for small and medium-sized businesses, where relatively small series are manufactured. Besides, the tools must be purpose made for the tool holder in question.
- During use of the punching machine the tool is subject to wear due to the great forces acting on it, and in particular the cutting edges of the moving punch and the stationary die will become less sharp. Given the high price of the tools, the above are therefore ground after some time, which makes the above-mentioned cutting edges sharp enough again for accurate and problem-free punching. The grinding of the punching tools is possible a number of times depending on the wear, to prolong their service life, and the height of the punch or die decreases each time.
- The height of the die lost through the grinding is compensated for by fitting filler plates between the die holder and the die. The punch height reduced by the grinding can also be compensated for in this way. The fitting of filler plates, which is also necessary when punch and die are fitted in a separate tool holder, is a laborious operation.
- The punch is driven over a fixed operating stroke length, and this length is great enough to allow a punching to be carried out in a material to be worked with a specific, maximum thickness. Where the material is of lower thickness the use of the great fixed operating stroke length results in loss of energy and time.
- Another disadvantage of the punching machines according to the state of the art is that the stripper pressure on the material to be worked is difficult to adjust and increases during the punching as a result of the fact that the punch movement and the stripper movement are coupled by means of a spring element. This is a particular disadvantage when punching soft materials, when an impression of the stripper can be left behind in the material, which is undesirable.
- In addition, the production of a known stripper, intended for interacting with a punch of an angular shape and intended for guiding the latter, is expensive as a result of the necessary processing operation (spark erosion).
- The object of the invention is to diminish the above-mentioned disadvantages, and to that end it provides a punching machine characterized according to claim 1.
- Advantageous embodiments of the punching machine according to the invention are described in the sub-claims.
- In the punching machine according to the invention there is no separate tool holder, and use can be made of standard tools which are obtainable cheaply in many places, and which can be fitted quickly in the appropriate holders using a drawer system which will not be described in any further detail.
- Controlling the operating stroke of the punch holder depending on the length of the punch produces a saving in the time and energy required for a punching operation. The same beneficial effect occurs if the initial position of the punch holder is adapted to the actual thickness of the material to be worked, which initial position then lies, for example, at a fixed distance from the top surface of the material to be worked.
- Furthermore, after the grinding of the punch, the use of filler plates in the punching machine according to the invention is unnecessary, since the movement of the punch holder is controlled depending on the actual punch height determined by a measuring device. Nor do filler plates have to be used any longer after grinding of the die, since the die is moved into a predetermined height setting relative to the supporting face depending on the actual die height determined by a measuring device.
- In the punching machine according to the invention the stripper pressure on the sheet material can be set and limited independently of the movement of the punch during contact of the stripper with the material, as a result of which the stripper need no longer damage the material to be worked.
- The arrangement of the punch and the stripper is such that the stripper going with the punch can be made with the aid of the punch itself from a "blind" stripper. This constitutes a considerable cost saving, in particular in the case of complex punch shapes.
- The invention is explained with reference to an embodiment shown in the drawing, in which:
- Fig. 1 is a side view in cross-section of a part of the punching machine according to the invention;
- Fig. 2 is a front view in cross-section of the part of the punching machine of Fig. 1;
- Figs. 3 and 4 are views in cross-section of the part of the punching machine of Fig. 2, in other working positions;
- Fig. 5a is a side view in cross-section of a measuring device according to the invention;
- Fig. 5b is a front view of the measuring device of Fig. 5a, partially cut away;
- Fig. 5c is a top view of the measuring device of Fig. 5a in cross-section along line V-V;
- Fig. 6 is a side view in cross-section of a die in a controllable die holder; and
- Fig. 7 is a schematic illustration to explain how the punching machine according to the invention works.
- Figs. 1 and 2 show a part of a
frame 2, in which ashaft 4 is fixed rotatably by means of abearing 6. Theshaft 4 is rigidly connected by means ofbolts 8 andcoupling sleeves 10 to areaction piston 12, in which afixing connection 14 is screwed down. Theshaft 4 is also guided infixing collar 16, which is coupled to acylinder 18. Slidably fitted in thecylinder 18 is a workingcylinder 20, which is firmly connected by means of bolts (not shown) toelements - Below
element 23 is apunch 26 which via apunch holder 28,holder 24 andslide 25 is hydraulically positioned by means ofring 21 and is wedged againstelement 23. Around the end of thepunch 26 is astripper 30 accommodated in astripper holder 32, which is coupled to pins consisting of twoparts pin parts 36 each have at their end astop part 38, on which rests aring 40 which is fixed to apiston 42 by means of a screwed connection. - The device described above is driven hydraulically and, in order to prevent leakage of hydraulic fluid, is provided at suitable points with
sealing elements - If
spaces cylinder 20 can be shifted relative to thecylinder 18 and thefixing connection 14, by pressing fluid under pressure into thespace 60 and at the same time allowing fluid to flow out of thespace 62, or vice versa. The movement of the workingcylinder 20 is in this case limited, on the one hand, by thereaction piston 12 and, on the other hand, by a thickened portion at the end of thefixing connection 14. - In addition, there is hydraulic fluid under pressure in a
space 64, so that thepiston 42 is pressed to the position shown in the drawing and thering 40 connected thereto presses thepin parts 36 until thestop part 38 rests on theelement 22. This causes thepin parts 34 to be pressed with their stop parts into theholder 24. - An
arm 66 is secured on theelement 22 by means of ascrew 70 and apressure sleeve 72. Fitted on thearm 66 is aplate 68, which interacts with atransducer 74, which is fitted on a part of theframe 2 and emits a data signal which is a measure of thedistance 76 between theplate 68 and thetransducer 74, and thus constitutes a measure of the position of the workingcylinder 20 relative to thecylinder 18, i.e. the position of thepunch 26 relative to theframe 2. - Further a
proximity sensor 78 is provided, which can detect the presence of a projectingpart 80 of thepunch holder 28. Thus, a monitoring of the correct position of thepunch 26 or thepunch holder 28 is possible. - Below the
stripper 30 the sheet-type material 82 to be worked lies on a supportingface 84. The top surface of a part of apunch holder 86 with apunch 88 lies flush with the top surface of the supportingface 84. - The way in which a punching operation is carried out with a punching machine according to the invention is described below with reference to Figs. 3 and 4.
- From the initial position shown in Figs. 1 and 2, working
cylinder 20 is moved downwards insidecylinder 18 by pressing hydraulic fluid under pressure into thespace 60 and simultaneously making hydraulic fluid flow away out of thespace 62. Thepunch 26 and thestripper 30 thereby move together towards thematerial 82 to be worked, just until thestripper 30 rests on the top surface of the material. Fig. 3 shows this position. - If the working
cylinder 20 is driven down still further, then thepunch 26 moves further through the hole in thestripper 30 and through thematerial 82, while thestripper 30 remains resting on the material. Thestripper holder 32 here presses thepin parts 34 up inholder 24, and thesepin parts 34 press thepin parts 36 up inelements pin parts 36 thereby press thering 40 with thepiston 42 fixed thereon up relative toelement 22, as a result of which hydraulic fluid is pressed out of thespace 64. This is possible through the fact that thespace 64 is connected to a hydraulic buffer (not shown in further detail), in which the pressure is adjustable and virtually constant, for example a space in which a small volume of fluid is maintained under adjustable pressure by means of a large volume of gas. During the punching operation,stripper 30 is thus pressed with a constant, adjustable force onto the material to be worked. - It can be seen from Figures 1 and 2 that the end of the
punch 26 in the initial position of the punching machine lies above the hole in thestripper 30, and that during a punching operation (see Figs. 3 and 4) the end of the punch moves through the hole in the stripper. If thestripper 30 is not provided with a hole (in which case the stripper is "blind"), at the next punching operation a hole precisely adapted to the shape of the punch will be produced in the stripper, which means that an expensive working of the individual stripper to obtain a shaped hole is not necessary. - The
transducer 74 described with reference to Figs. 1 and 2 emits a data signal containing information on the position of the drive of the punch. With such information a control of the initial position and of the operating stroke of the punch is possible in principle. Since, however, the punch height is variable as a result of grinding, and it plays a role in this control, as will be explained below with reference to Fig. 7, the control must be provided with the actual height measurement of thepunch 26. The drive of the die is also controllable in a similar way for the positioning thereof, as will be made clear below with reference to Fig. 6. This control must in this case also be provided with the actual height measurement of the die, which measurement is variable as a result of grinding. - A measuring device, shown in Figs. 5a, 5b and 5c serves for measuring the height of the punch and the die. The measuring device comprises a step-shaped bottom part with
steps proximity sensor steps plate 120 which is slidable by means of apin 118 at right angles to the steps and is provided with abevel 121. Thepin 118 can slide downwards in ablock 122 until a thickenedstop end 119 further prevents this, and can slide upwards until asleeve 124 further prevents this. Fitted above the measuringplate 120 is atransducer 126 which can emit a data signal which constitutes a measure of the distance between the top side of the measuringplate 120 and the bottom end of thetransducer 126. - The distance between the bottom side of the measuring
plate 120 and thebottom step 100 is known for the initial position of the measuring device, where thestop end 119 rests onblock 122, and is slightly smaller than the minimum height of a punch. In the same position of the measuring device the distance between the bottom side of the measuringplate 120 and theother steps - For measurement of the height of a punch, it is placed on
step 100, againstface 106. Withproximity sensor 112 the presence of the punch is simple to establish, so that the kind of element (punch or die) of which the height is being measured is known. For the placing of the punch the measuringplate 120 is pressed upwards over a specific distance, from which distance, together with the known thickness of the measuringplate 120 and the known distance from the bottom side of the measuringplate 120 to thestep 100, the actual height of the punch can be derived and recorded simply by electronic means. - In a corresponding way the height of a die can be determined and recorded on
step respective proximity sensor - Fig. 6 shows the die 88 in the
die holder 86, comprising a bottom part and a top part. The bottom part is provided withvarious pins 128, only one of which is shown, and which during an upward movement of the bottom part can slide in aguide 90 up to a stop edge in the top part. The bottom part of thedie holder 86 thereby makes the die 88 slide through the top part. - An upward or downward movement of the die 88 is indirectly caused by a movement to the right or to the left of a
piston 130 in acylinder 132 provided with aseal 131, which piston movements are produced, on the one hand, by admitting hydraulic fluid under pressure through anopening 134 into aspace 133 in thecylinder 132 and, on the other hand, making this fluid flow out of thespace 133 under the influence of the force of aspring 136 on a first wedge-shapedelement 138 driven by thepiston 130. The horizontal movement of the first wedge-shapedelement 138 over a certain distance produces a vertical movement of a second wedge-shapedelement 140 over a smaller distance, as a result of which the bottom part of thedie holder 86 and the die 88 are also moved in the vertical direction. -
Spring 136 is situated in aholder 142, in which apin 144 is also fitted, one end of which pin is always coupled by means of thespring 136 to the wedge shapedelement 138, and of which the other end is provided with aplate 146 by means of a screw connection. - The
plate 146 interacts with atransducer 148 which can produce a data signal constituting a measurement of thedistance 150 between theplate 146 and thetransducer 148. - Through the control of the inflow and outflow of hydraulic fluid inside the
cylinder 132, depending on thedetermined distance 150, the top side of the die can be positioned relative to the supportingface 84.Compression spring 152 here ensures a constant contact between the wedge-shapedparts - Screwed onto the bottom part of the
die holder 86 is a projectingpart 154, coupled with thedie 88. When the die 88 is in a correct position in the die holder, the projectingpart 154 faces aproximity sensor 156, as a result of which a detection of this correct position or a deviation therefrom is possible. - Other not designated hatched parts in Fig. 6 are structural parts which take up a fixed position relative to the supporting
face 84. - Fig. 7 shows elements necessary for a punching operation, the hydraulic drives being shown only symbolically as a piston in a cylinder. At various points the
frame 2 is also shown symbolically as a fixed fastening point for the elements. - Distance A between
plate 68 andtransducer 74 varies, as do distance B between the top side of thepunch 26 and the top side of the supportingface 84, and distance C between the bottom side of thestripper 30 and the supportingface 84. At least one combination of the distances A, B and C is known and stored in a memory of the data processing unit of the punching machine. Distance D is the actual punch height which can vary through grinding. Distance E is the thickness of the material to be worked. Distance G is the distance betweenplate 146 andtransducer 148 and is variable. Distance H between the top side of the supportingface 84 and the top side of thepunch holder 86 is in a fixed, known relationship to distance G. At least one combination of the distances G and H is known and stored in a memory of the data processing unit of the punching machine. Distance K is the actual height of the die 88, which height can vary as a result of grinding. - Fig. 7 shows a
data processing unit 160, with which incoming data signals fromtransducer 74 vialine 162, fromtransducer 148 vialine 164, from measuringdevice 166 according to Figs. 5a, 5b and 5c vialine 168 and from adevice 170 for the input of the thickness E of the material to be worked vialine 172 are processed and by means of a control program lead to controlsignals 174 for the hydraulic drives in the punching machine. - Prior to the punching the top side of the die 88 is positioned at the same height as the top side of the supporting
face 84. Thedata processing unit 160 regulates distance G for this purpose in such a way that the distance H proportionate thereto corresponds to the die height K measured with thedevice 166. Also prior to punching, thestripper 30 is placed at a predetermined distance, for example 0.5 mm, above the material to be worked. Thedata processing unit 160 controls the distance A for this purpose in such a way that the difference distance C-E is equal to 0.5 mm. - During the punching the
die 26 is moved through the material 82 until the end of the die 26 lies a predetermined distance below the top side of the material. This distance can be, for example, equal to the thickness of the material, plus 0.5 mm. Making use of the distance D which has become known during the measurement of the die height with thedevice 166, thedata processing unit 160 then regulates the distance A in such a way that at the end of the punching stroke the difference distance B-D is equal to - 0.5 mm. - A different embodiment from the embodiment of a punching machine according to the invention described above may contain a magazine for different punches and dies, each magazine place for a punch or a die being provided with a measuring device for determining the height thereof, for example of the type described with reference to Figs. 5a, 5b and 5c.
- Each magazine place is then designed in such a way that, after a punch or a die is put away in it, while it is being placed in it or prior to its removal from it, the height measurement of the particular tool is carried out, following which this height information is stored in the memory of the relevant control program. When this control program is being run the control signals for the hydraulic drives determining the position of punch and die are then passed on automatically per tool place before the punch movement is carried out, all this in the manner described above with reference to Fig. 7.
- The putting away of a punch or a die in a magazine place or its removal therefrom can be established by means of a proximity sensor such as the
sensors - The placing of the tools in the holders of the punching machine can take place by hand here, but can also be by means of a controlled mechanical device which permits an automatic tool change.
Claims (12)
a second control device (146, 148) for adjusting the die holder (86) in height relative to the supporting face (84);
a first measuring device (120, 126, 102; 120, 126, 104; 166) for producing a first data signal representing the height of the die (88) to be used;
a second measuring device (120, 126, 100; 166) for producing a second data signal representing the height of the punch (26) to be used;
a device (170) for producing a third data signal representing the thickness of the material to be worked;
a data processing device (160) to which the three data signals are fed and which in response thereto:
produces a first control signal to be fed to a first control device for controlling the punch holder (28) in such a way that at the end of the operating stroke thereof the end of the punch (26) lies at a predetermined distance below the top surface of the material (82) to be worked, and
produces a second control signal to be fed to the second control device for taking the top surface of the die (88) into a predetermined height setting relative to the supporting face (84) prior to the operating stroke of the punch (26).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90202364T ATE91244T1 (en) | 1989-09-12 | 1990-09-05 | PUNCHING MACHINE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8902274 | 1989-09-12 | ||
NL8902274A NL8902274A (en) | 1989-09-12 | 1989-09-12 | PUNCHING MACHINE. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0417836A1 true EP0417836A1 (en) | 1991-03-20 |
EP0417836B1 EP0417836B1 (en) | 1993-07-07 |
Family
ID=19855297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90202364A Expired - Lifetime EP0417836B1 (en) | 1989-09-12 | 1990-09-05 | Punching machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US5136521A (en) |
EP (1) | EP0417836B1 (en) |
AT (1) | ATE91244T1 (en) |
DE (1) | DE69002143T2 (en) |
NL (1) | NL8902274A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4301309A1 (en) * | 1993-01-20 | 1994-07-21 | Behrens Ag C | Cutting press |
EP0757926A1 (en) * | 1995-08-09 | 1997-02-12 | Amada Metrecs Company, Limited | Punching processing method and roll forming die used in this processing method |
WO2000023207A2 (en) * | 1998-10-19 | 2000-04-27 | Mika Virtanen | A sheet fabrication center and methods therefor of optimally fabricating worksheets |
EP1502673A1 (en) * | 2003-07-26 | 2005-02-02 | Trumpf Werkzeugmaschinen GmbH + Co. KG | Machine tool with driving means for the tool |
EP2092994A1 (en) * | 2008-02-22 | 2009-08-26 | Trumpf Werkzeugmaschinen GmbH + Co. KG | Machine tool for cutting and/or forming plate-form workpieces |
WO2011039730A1 (en) * | 2009-10-02 | 2011-04-07 | Euromac Spa | Embossing apparatus with a moveable, cammed - actuated forming die |
EP2669024A1 (en) * | 2012-05-30 | 2013-12-04 | TRUMPF Werkzeugmaschinen GmbH + Co. KG | Machine tool and method for pushing out a workpiece part |
WO2021047811A1 (en) * | 2019-09-11 | 2021-03-18 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Equipping device and method for equipping a tool for stamping or forming planar materials |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0813387B2 (en) * | 1990-11-08 | 1996-02-14 | 株式会社三協マニテック | Punching board punching machine |
US5438521A (en) * | 1994-03-10 | 1995-08-01 | Finn-Power International, Inc. | Apparatus and method for measuring and compensating the length of a punch tool |
JP2705591B2 (en) * | 1994-10-04 | 1998-01-28 | 村田機械株式会社 | Punch drive controller |
FI100648B (en) * | 1995-12-14 | 1998-01-30 | Balaxman Oy | punching |
JP3147007B2 (en) * | 1996-10-03 | 2001-03-19 | 村田機械株式会社 | Combined processing machine and sheet material processing method |
DE19929163C1 (en) * | 1999-06-25 | 2001-01-18 | Feintool Internat Holding Ag L | Device for fine cutting workpieces from a sheet metal |
PL1600225T3 (en) * | 2004-05-27 | 2008-10-31 | Trumpf Werkzeugmaschinen Gmbh Co Kg | Punching machine with electrical rotating- /lifting drive |
WO2008103020A1 (en) * | 2007-02-23 | 2008-08-28 | Metalsa Servicios, S. De R.L. | Punching press with interchangeable punch-holder and mould-holder |
US7690130B1 (en) | 2008-05-30 | 2010-04-06 | Elizabeth Carbide Kentucky, Inc. | Punch deflection gauge |
PL2177289T3 (en) | 2008-10-20 | 2011-12-30 | Trumpf Werkzeugmaschinen Gmbh Co Kg | Machine tools and method for discharging a workpiece part |
JP5970330B2 (en) * | 2012-10-17 | 2016-08-17 | 株式会社アマダホールディングス | Mold length measuring device |
JP6061764B2 (en) * | 2013-04-16 | 2017-01-18 | 株式会社アマダホールディングス | Punch press |
DE102015116562A1 (en) | 2015-09-30 | 2017-03-30 | Tkr Spezialwerkzeuge Gmbh | Hydraulic punching device as well as punching punch carrier for punching device |
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FR2492716A1 (en) * | 1980-10-29 | 1982-04-30 | Yaskawa Denki Seisakusho Kk | MACHINE TOOL WITH DIGITAL CONTROL PILOTED BY COORDINATES OF THE WORKPIECE |
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EP0205240A2 (en) * | 1985-05-31 | 1986-12-17 | Sugano Mfg. Co., Ltd. | Automatic punching machine for punching a laminar workpiece |
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SE429268B (en) * | 1978-04-26 | 1983-08-22 | Pullmax Ab | NUMERIC WORKING CONTROL FOR STEP SOURCE OF A WORK PIECE |
US4481533A (en) * | 1981-11-27 | 1984-11-06 | Lenkeit Industries, Inc. | Method and apparatus for successively positioning sheets of material with precision for punching aligning holes in the sheets enabling the sheets to be used in the manufacture of composite circuit boards |
JPS59102298U (en) * | 1982-12-27 | 1984-07-10 | 株式会社小松製作所 | Press machine slide stop position control device |
US4947719A (en) * | 1987-09-01 | 1990-08-14 | S. B. Whistler & Sons, Inc. | Punch and die system |
US4916990A (en) * | 1987-12-23 | 1990-04-17 | Siemens Aktiengesellschaft | Method for controlling the path of a punching tool |
US4987528A (en) * | 1988-03-14 | 1991-01-22 | Johnson Service Company | Signature analysis control system for a stamping press |
US4993295A (en) * | 1988-12-08 | 1991-02-19 | Utica Enterprises, Inc. | Punch stripper |
US4998958A (en) * | 1989-05-22 | 1991-03-12 | Murata Wiedemann, Inc. | Multitool punch holder |
-
1989
- 1989-09-12 NL NL8902274A patent/NL8902274A/en not_active Application Discontinuation
-
1990
- 1990-09-05 AT AT90202364T patent/ATE91244T1/en not_active IP Right Cessation
- 1990-09-05 DE DE90202364T patent/DE69002143T2/en not_active Expired - Fee Related
- 1990-09-05 EP EP90202364A patent/EP0417836B1/en not_active Expired - Lifetime
- 1990-09-06 US US07/578,257 patent/US5136521A/en not_active Expired - Fee Related
Patent Citations (6)
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DE1903564A1 (en) * | 1968-01-25 | 1969-11-27 | Vero Prec Engineering Ltd | Numerically controlled machine tool |
FR2130991A5 (en) * | 1971-03-29 | 1972-11-10 | Strandell Per Olof | |
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FR2498964A1 (en) * | 1981-01-30 | 1982-08-06 | Amada Co Ltd | SHEAR MACHINE WITH THICKNESS DETECTOR |
EP0205240A2 (en) * | 1985-05-31 | 1986-12-17 | Sugano Mfg. Co., Ltd. | Automatic punching machine for punching a laminar workpiece |
GB2186394A (en) * | 1986-02-07 | 1987-08-12 | Amada Co Ltd | Controlling the stroke of a press or shearing machine |
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EP0757926A1 (en) * | 1995-08-09 | 1997-02-12 | Amada Metrecs Company, Limited | Punching processing method and roll forming die used in this processing method |
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US6386008B1 (en) | 1998-04-08 | 2002-05-14 | Lillbacka Jetair Oy | Sheet fabrication center and methods therefor of optimally fabricating worksheets |
US6526800B1 (en) | 1998-04-08 | 2003-03-04 | Lillbacka Jetair Oy | Sheet fabrication center and methods therefor of optimally fabricating worksheets |
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WO2011039730A1 (en) * | 2009-10-02 | 2011-04-07 | Euromac Spa | Embossing apparatus with a moveable, cammed - actuated forming die |
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US9205481B2 (en) | 2012-05-30 | 2015-12-08 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Moving workpiece parts on machine tools |
US9446442B2 (en) | 2012-05-30 | 2016-09-20 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Moving workpiece parts on machine tools |
WO2021047811A1 (en) * | 2019-09-11 | 2021-03-18 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Equipping device and method for equipping a tool for stamping or forming planar materials |
Also Published As
Publication number | Publication date |
---|---|
NL8902274A (en) | 1991-04-02 |
US5136521A (en) | 1992-08-04 |
DE69002143D1 (en) | 1993-08-12 |
EP0417836B1 (en) | 1993-07-07 |
ATE91244T1 (en) | 1993-07-15 |
DE69002143T2 (en) | 1994-03-24 |
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